| 1. |
- Hedling, Erik, et al.
(författare)
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Kollektivets kollaps: om dygden i svensk 90-talsfilm
- 2002
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Ingår i: I ordets smedja. Festskrift till Per Rydén. - 91 7203 494 7
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Bokkapitel (övrigt vetenskapligt/konstnärligt)abstract
- This article deals with concepts of virtue in Swedish blockbusters of the late 1990s, arguing that the general theme seems to be the collapse of traditional Swedish welfare collectivity.
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| 2. |
- Bergman, Kerstin, et al.
(författare)
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Ska vi äta våra döda: Linné mellan tro och nytta
- 2002
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Ingår i: I ordets smedja: Festskrift till Per Rydén. - 9172034947 ; , s. 182-191
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Bokkapitel (övrigt vetenskapligt/konstnärligt)abstract
- About the struggle between faith and utilitarian aspects in the writings of Carl von Linné.
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| 6. |
- Tian, Haining, et al.
(författare)
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Enhancement of p-Type Dye-Sensitized Solar Cell Performance by Supramolecular Assembly of Electron Donor and Acceptor
- 2014
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Ingår i: Scientific Reports. - : Springer Science and Business Media LLC. - 2045-2322. ; 4, s. 4282-
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Tidskriftsartikel (refereegranskat)abstract
- Supramolecular interactions based on porphyrin and fullerene derivatives were successfully adopted to improve the photovoltaic performance of p-type dye-sensitized solar cells (DSCs). Photoelectron spectroscopy (PES) measurements suggest a change in binding configuration of ZnTCPP after co-sensitization with C60PPy, which could be ascribed to supramolecular interaction between ZnTCPP and C60PPy. The performance of the ZnTCPP/C60PPy-based p-type DSC has been increased by a factor of 4 in comparison with the DSC with the ZnTCPP alone. At 560 nm, the IPCE value of DSCs based on ZnTCPP/C60PPy was a factor of 10 greater than that generated by ZnTCPP-based DSCs. The influence of different electrolytes on charge extraction and electron lifetime was investigated and showed that the enhanced V-oc from the Co2+/(3+)(dtbp)(3)-based device is due to the positive E-F shift of NiO.
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| 7. |
- Akter, Shaheda T.
(författare)
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Experimental characterization and numerical modeling of compression perpendicular to the grain in wood and cross-laminated timber
- 2022
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Compression perpendicular to the grain (CPG) of wood is a typical loading situation in timber structures. It has been an extensively studied research topic for decades, due to the highly ductile behavior of wood under such loading, the large variations in mechanical properties, and the relevance of these properties in structural design. Among others, the main influencing factors for CPG properties are stressed volume, load and support configurations, and annual ring orientations to the loading direction. After the innovation of the massive, engineered wood based product, cross-laminated timber (CLT) and its application in high rise buildings, CPG of wood has gained further importance. The development of a non-homogeneous, undesired and combined stress state under CPG in solid wood, due to the material anisotropy in the radial-tangential plane, can build up a complex multi-axial stress state in CLT. As a comparatively new product, the study of the influencing factors for CPG properties of CLT, and an understanding of the local material behavior under such loading, is essential for product characterization and for the development of design guidelines to ensure safe and efficient design.The main aim of the doctoral thesis is to establish a relationship betweenthe anisotropic behavior of clear wood in the transverse plane and the structural response of CLT under CPG loading. Both experimental and numerical studies were adopted herein, to enhance the understanding of the basic material behavior and the product and structural behavior. On the clear wood scale, the focus was on developing a test setup for uniaxial and biaxial loading in the radial-tangential(RT) plane. The potential of the developed test setup for the biaxial testing in the transverse plane was exploited for the investigation of the moisture and time dependent behavior of clear wood under radial compression and rolling shear loading. For data acquisition, in addition to the force and displacement data measured by the internal actuators of the testing machine and an external load cell,a contact-free digital image correlation (DIC) system was used in the experimental investigations. A numerical model was developed, which can describe the elasto-plastic behavior of wood under compression in the transverse plane and predict the structural behavior of solid wood and CLT. For that purpose, a novel Quadratic multi-surface (QMS) failure criterion and a simplified Hoffman failure criterion were implemented in a user-subroutine in the finite element software Abaqus®, and their suitability was compared with the Abaqus implemented Hill’s criterion.The validation of the material models was based on the experimental investigations of failure behavior of clear wood under stress perpendicular to the grain with rolling shear interaction. The material models were further utilized to predict the structural response of solid wood and CLT wall-to-floor connections under CPG loading. The predicted response of CLT connections under CPG by using the above-mentioned material models was compared with experiments, which investigated the influences of different connection types, wall and floor thicknesses, positions of walls, and outer deck layer orientations. The models were then applied to investigate the influence of the pith location in the boards, the number of layers and the thickness of walls and the floor on the stiffness and strength of CLT connections. Moreover, the CLT connection’s rotational rigidity as a consequence of compressive force from the upper floor in a multi-story building was studied by means of finite element calculations.The DIC measured strain fields from the experiments on clear wood confirmed the dependence of strain field on the curvature of the annual rings. As regards the material models, Hill’s model resulted in significantly higher force carrying capacity than experiments on clear wood, whereas Hoffman’s and QMS models predicted reasonably well the force-displacement relationships as found in experiments. The Hoffman’s and QMS models predicted stiffness was about 5–10% higher than corresponding experimental results on clear wood, and about 25% higher for CLT connections. The higher difference in the latter case is due to the difference in material properties of clear wood and structural timber, and the contact behavior between the structural members. The results from CLT wall-to-floor connections revealed a strong influence of loading and supporting configurations, wall thickness and pith locations on their stiffness and strength. A compressive loading on the CLT wall showed a positive effect on the rotational stiffness of CLT wall-to-floor connections, which considerably reduces the CLT floor mid-span deflection in comparison to a simply-supported floor.The thesis work contributes to an enhanced understanding of the anisotropic material behavior of wood in the RT-plane and of its effects on structural timber and CLT under CPG loading. The outcomes of the thesis are beneficial to the product design and standardization of CLT and can be applied in further product development and in optimized structural design.
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| 9. |
- Elmroth, Erik, 1964-, et al.
(författare)
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A User-Centric Cluster and Grid Computing Portal
- 2009
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Ingår i: International Journal of Computational Science and Engineering (IJCSE). - : InderScience Publishers. - 1742-7185 .- 1742-7193. ; 4:2, s. 127-134
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Tidskriftsartikel (refereegranskat)abstract
- The HPC2N Grid portal is a user-centric environment that provides a homogeneous interface to a set of heterogeneous High-Performance Computing (HPC) resources from standard web-browsers. The interface includes support for most everyday activities, such as to submit, manipulate and delete jobs, monitor queues and job status, obtain user-, project-, and resource information, view job output, etc. This contribution reviews the portal functionalities and presents the design and implementation of the underlying system architecture. Some major design considerations, features and limitations are discussed. The portal currently gives access to all major resources at HPC2N, in total comprising over 700 CPUs.
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| 10. |
- Engström, Ellinor, et al.
(författare)
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Outcome of iCBT for ADHD symptoms : A randomized controlled study
- 2023
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Ingår i: Abstracts from the 12th Swedish Congress on internet interventions (SWEsrii), Uppsala University, Sweden. ; , s. 2-2
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- Attention deficit hyperactivity disorder is a disorder characterized by, hyperactivity, impulsivity, lack of attention.The condition results in several impairments that can impair everyday functioning and lead to underperformance. At present, there are not many large scale studies that have investigated the effect of Internet-based Cognitive Behavioral Therapy (iCBT) for ADHD symptoms. This study presents the outcome of a clinical trial of internet- based cognitive behavioral therapy (iCBT), using a randomized controlled study design, with the primary aim to increase quality of life, as well as to reduce symptoms of ADHD, anxiety, depression, and stress. Approximately a hundred participants with symptoms of ADHD will be included in the first wave (recruitment for the second wave comprised of an additional 100 participants is ongoing) and randomized to two conditions (treatment and wait-list control). The treatment period is comprised of ten weeks, with two mandatory modules and ten modules from which the participants can choose freely. The study utilizes an intention to treat design, with ANOVAs and Reliable Change Index to evaluate treatment effects both on an individual and group level. Implications for iCBT for ADHD symptoms will be discussed.
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